Online synchronous grinding device for bar straightening machine roller

The invention relates to an online synchronous grinding device for a bar straightening machine roller. The online synchronous grinding device for the bar straightening machine roller comprises a base shell, a first driving assembly and a grinder, wherein the first driving assembly comprises a motor, a connecting shaft, a first worm gear and a first lead screw, the first buffering mechanism comprises a first elastic element and a push plate, and the second buffering mechanism comprises a second elastic element. The grinder and the roller to be ground are always kept in fit contact in the grinding process. The grinding effect is guaranteed. The push force generated by the push plate to the grinder is more uniform, so that the grinder generates more uniform friction force in the grinding process, the surface of the roller to be ground is ground to be smoother, and higher grinding precision is achieved. In the process of grinding the straightening machine roller by the grinding device, a straightening machine doe